Specifications

Principle of Operation
The DM5 series resolver decoder provides an absolute encoder
system in conjunction with any one of the AVG Automation's
single-turn resolvers. As shown in the diagram on the next
page, the resolver rotor winding is excited from a reference
sinusoidal generator inside the DM5 unit. The analog output
signals from the resolver stator windings, after signal condi-
tioning in the buffer amplifiers, are decoded to digital format
in the Ratiometric Tracking Converter. The zero offset, set by
the front panel thumbwheels, is continuously added to this
value and the resultant position is displayed on the front panel
of the unit. The position information is also made available in
a parallel format for external devices, such as PLCs, remote
displays etc.
Programmable Full Scale Offset for
Easy Set-Up
You can mount the resolver on the machine without any con-
cern for mechanically matching the resolver zero to the
machine zero. Once the resolver is coupled to the machine
shaft, the only thing you have to do is to bring the machine to
a known position, say home position, and set an offset number
using the front panel thumbwheel switches until the display
reads zero. Now the resolver zero is aligned with the machine
zero. This is especially useful during initial start-up in that it
reduces the set-up time. The offset can also be used to com-
pensate for any wear on the machine.
Variety of Outputs, Built-in PC-Handshake,
permit Interface to any PLC
BCD, natural Binary, or Gray Code output formats are avail-
able with a choice of TTL, PNP (sourcing) transistor or NPN
(sinking) transistor outputs. Optional PLC synchronization
circuit provides an error-free method of interfacing BCD posi-
tion data from the decoder to any PLC in the market. Upon
receipt of a data transfer command from the PLC, the stable
data is latched and made available to the PLC
Multiplexing Capability
The TTL type of outputs have multiplexing capability, which
allows more than one decoder to be connected to the same
control unit for multi-axis applications. For multiplexing PNP
or NPN type outputs, consult the factory.
THE DM5 DECODER
DM5 RESOLVER DECODER SINGLE-TURN,
SINGLE-CHANNEL
◆ Resolver based, single-turn, absolute position. No
loss of position under any situation
◆ Programmable full scale zero offset for easy set-up
◆ Variety of outputs, built-in PC-Handshake, permit
interfacing to any PLC
◆ Multiplexing capability
◆ Up to 8192 counts-per-turn resolution at 1800 rpm
◆ Highly noise-immune ratiometric tracking
converter
◆ Extremely rugged and reliable resolver as position
transducer
◆ Optically isolated outputs
800-TEC-ENGR
www.avg.net
A-24
Position Transducers/Sensors